What best describes the function of the Golgi Apparatus in a cell?

The function of the Golgi apparatus is best described as modifying, sorting, and packaging proteins. This organelle plays a crucial role in the post-translational modification of proteins synthesized in the endoplasmic reticulum. Once proteins are produced, they are transported to the Golgi apparatus, where they undergo further modifications, including glycosylation or phosphorylation. After these modifications, the Golgi apparatus sorts and packages these proteins into vesicles, which are then sent to their designated locations within the cell or exported outside of the cell.

This function is essential for ensuring that proteins reach their proper destinations and perform their intended roles in cellular processes. The Golgi apparatus essentially acts as a processing and shipping center for proteins and lipids, which are vital for cell function and communication.